<nz-tree-select nzDefaultExpandAll="true" nzShowSearch="true" [nzNodes]="_treeData" [nzPlaceHolder]="l('FilterByPermission')"
  [(ngModel)]="selectedPermission" (ngModelChange)="selectedChange($event)" [nzMultiple]="multiple" [nzDropdownStyle]="dropDownStyle">
</nz-tree-select>
